Flexible bags – With venting or ventilation means – Opening in bag material
Patent
1992-08-27
1993-07-13
Shoap, Allan N.
Flexible bags
With venting or ventilation means
Opening in bag material
383106, 383107, B65D 3301, B65D 3304
Patent
active
052267350
ABSTRACT:
A bag, for packaging fruits or vegetables, is made of opaque, flexible plastic sheet material. The rear wall of the bag is however provided with a tranversal window made of transparent, flexible plastic sheet material, extending over the width of the bag and comprising a plurality of perforations distributed over its surface. The transparent plastic sheet material is thicker than the opaque plastic sheet material; it requires additional mechanical resistance due to the perforations. A method and apparatus fabricate the plastic bag from two strips of opaque plastic sheet material, and a strip of transparent plastic sheet material. In accordance with this method, the three strips are placed side by side with the transparent strip in the center; the adjacent borders of the strips are heat welded together to convert the three strips to a single band; this band is folded to form a two-layer band; and this two-layer band is tranversely cut at longitudinally spaced apart locations thereof with the two layers heat welded on both sides of each cut.
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Pascua Jes F.
Shoap Allan N.
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